alias.c (find_base_term): Check for NULL term before returning.

2009-06-01  Luis Machado  <luisgpm@br.ibm.com>

	* alias.c (find_base_term): Check for NULL term before returning.

From-SVN: r148047

gcc/ChangeLog

+2009-06-01  Luis Machado  <luisgpm@br.ibm.com>
+
+	* alias.c (find_base_term): Check for NULL term before returning.
+
 2009-06-01  Maxim Kuvyrkov  <maxim@codesourcery.com>
 
 	Revert due to PR40320:

gcc/alias.c

@@ -1511,10 +1511,18 @@ find_base_term (rtx x)
 	/* If either operand is known to be a pointer, then use it
 	   to determine the base term.  */
 	if (REG_P (tmp1) && REG_POINTER (tmp1))
-	  return find_base_term (tmp1);
+	  {
+	    rtx base = find_base_term (tmp1);
+	    if (base)
+	      return base;
+	  }
 
 	if (REG_P (tmp2) && REG_POINTER (tmp2))
-	  return find_base_term (tmp2);
+	  {
+	    rtx base = find_base_term (tmp2);
+	    if (base)
+	      return base;
+	  }
 
 	/* Neither operand was known to be a pointer.  Go ahead and find the
 	   base term for both operands.  */